11700391680 has 252 divisors, whose sum is σ = 42023270520. Its totient is φ = 3119855616.

The previous prime is 11700391673. The next prime is 11700391693. The reversal of 11700391680 is 8619300711.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 926851 + ... + 939389.

It is an arithmetic number, because the mean of its divisors is an integer number (166759010).

Almost surely, 2^11700391680 is an apocalyptic number.

11700391680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11700391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21011635260).

11700391680 is an abundant number, since it is smaller than the sum of its proper divisors (30322878840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11700391680 is an frugal number, since it uses more digits than its factorization.

11700391680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12578 (or 12549 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 11700391680 in words is "eleven billion, seven hundred million, three hundred ninety-one thousand, six hundred eighty".